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发明名称
PULSE MODULATION SIGNALLING SYSTEMS.
摘要
申请公布号
IE18248(L)
申请公布日期
1944.12.21
申请号
IE19470000840
申请日期
1947.12.04
申请人
N.V. PHILIPS' GLOEILAMPENFABRIEKEN.
发明人
分类号
H04B1/00;H04B7/00;(IPC1-7):H04B1/00
主分类号
H04B1/00
代理机构
代理人
主权项
地址
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